SUM(1)                  COMMAND REFERENCE                  SUM(1)



NAME
     sum - generate checksum and count 1024-byte blocks in a file

SYNOPSIS
     sum [ filename... ]

DESCRIPTION
     Sum calculates and prints a 16-bit checksum for the named
     file, and also prints the number of 1024-byte blocks in the
     file.  It is typically used to look for bad spots, or to
     validate a file communicated over some transmission line.

EXAMPLES
     The following example will print the checksum followed by a
     block count and the filename for each file in /da/tmp:

          sum /da/tmp/*

DIAGNOSTICS
     Read error
             This response is indistinguishable from end-of-file
             on most devices; check the block count.

RETURN VALUE
     [NO_ERRS]      Command completed without error.

     [NP_WARN]      An error warranting a warning message
                    occurred. Execution continues.

     [P_WARN]       A system error occurred. Execution continues.
                    See intro(2) for more information on system
                    errors.

SEE ALSO
     wc(1).




















Printed 4/6/89                                                  1

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